package BookTest;

public class C16Test {
    public static void main(String[] args) {
       C16RedLamp a = new C16RedLamp();
       a.light();
       C16YellowLamp b = new C16YellowLamp();
       b.light();
       C16GreeLamp c = new C16GreeLamp();
      c.light();
    }
}
